Intermediate field-induced phase of the honeycomb magnet BaCo\(_2\)(AsO\(_4\))\(_2\)
We use magnetometry, calorimetry, and high-resolution capacitive dilatometry, as well as single-crystal neutron diffraction to explore temperature-field phase diagram of the anisotropic honeycomb magnet BaCo\(_2\)(AsO\(_4)_2\). Our data reveal four distinct ordered states observed for in-plane magne...
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| creator | Mukharjee, Prashanta K Shen, Bin Erdmann, Sebastian Jesche, Anton Kaiser, Julian Baral, Priya R Zaharko, Oksana Gegenwart, Philipp Tsirlin, Alexander A |
| description | We use magnetometry, calorimetry, and high-resolution capacitive dilatometry, as well as single-crystal neutron diffraction to explore temperature-field phase diagram of the anisotropic honeycomb magnet BaCo\(_2\)(AsO\(_4)_2\). Our data reveal four distinct ordered states observed for in-plane magnetic fields. Of particular interest is the narrow region between 0.51 and 0.55 T that separates the up-up-down order from the fully polarized state and coincides with the field range where signatures of the spin-liquid behavior have been reported. We show that magnetic Bragg peaks persist in this intermediate phase, thus ruling out its spin-liquid nature. However, the simultaneous nonmonotonic evolution of nuclear Bragg peaks suggests the involvement of the lattice, witnessed also in other regions of the phase diagram where large changes in the sample length are observed upon entering the magnetically ordered states. Our data highlight the importance of lattice effects in BaCo\(_2\)(AsO\(_4)_2\). |
| doi_str_mv | 10.48550/arxiv.2403.04466 |
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| subjects | Dilatometry Magnetic measurement Neutron diffraction Phase diagrams Single crystals Spin liquid |
| title | Intermediate field-induced phase of the honeycomb magnet BaCo\(_2\)(AsO\(_4\))\(_2\) |
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